I am 6'3" and 220 using my commuter for short commutes in an around boston and some longer winter training rides. i ride every day in all weather.
I have a cross check with a flat bar and barends. i have run it fixed, SS, 1*8, 3*8 and now most happily with a Nexus 8 internal gear hub. The ability to run it fixed (which on a flat MUP could be really sensible and very light) or with internal gears puts this frame on the top of my list. I have a cheapo steel fork with disc tabs so i alwats have the option for a front disc.
it fits the biggest tires short of a 29er MTB and can be used for touring or CX.
that said, if you really want a specialized machine to make your commute fast, locking it to poles in a city is not a nessecity or a fixed/internal gear is not on the table... i would look at some other bikes such as:
-surly pacer with CF fork (cyclocross model for fender clearance?)
-soma smoothie ES or doublecross
-gunnar sport or crosshairs
-Salsa Chili con Crosso or casseroll
-Rivendell anything, if you can wait
-IF club racer
-bianchi Volpe and castro Valley
look on EBAY/ craigslist for old nice steel frames in your size, build'em up with nice parts
many flatbar road bkes may fit the bill too as long as they have propper fender/tire clearance

Aerobars will make any bike ride go faster and without traffic could be used in your situation.
Dynamo hub if night riding is in the plans?


If you have the money get handbuilt wheels for what ever bike you get, this is night and day. Being able to run 28's or 32mm tires is likely to be important too as upwards of 250 lbs. is going to make 23-25's a bit unhappy.